Both are UL rated locks. The Securam is more of an entry level lock, but if you have an S&G on a gun safe, it's probably their entry level lock as well.
I do tend to prefer the swing bolt versions over those with extending bolts (curved bolt that pivots instead of a square bolt that goes in and out) on gun safes.
There is a minor programming issue you will have to deal with on the Securam. If you decide to go this route, let me know, and I will tell you what to do.